The techniques used to generate most of these portraits typically involve the laying down of one's face upon a highly radioactive scanner bed and staring straight into a beam of powerful photons borne of modern methods not yet fully understood, defying the usual role of the self portrait by forcing the artist to manipulate a pre-distorted image of him- or herself. Casting the self in a favorable light is thereby made impossible by technique and technology. Since scanner abuse renders everyone as inherently bizarre (and thereby thwarts any vain impulses the portraitist might harbor), the computer becomes a humbling device.
Special bonus -- animated scanner abuse: